FarmVille is a real-time farm simulation game developed by Zynga, available as an application on the social-networking website Facebook and as an App on the Apple iPhone. The game allows members of Facebook to manage a virtual farm by planting, growing and harvesting virtual crops and trees, and raising livestock.[2] Since its launch in June 2009,[3] FarmVille has become the most popular game application on Facebook, with over 82.4 million active users and over 23.9 million Facebook application fans in May 2010.[4] The total FarmVille users are over 20% of the users of Facebook.[5][6] Despite this, Farmville is still classed by Zynga as being in Beta testing stage, with "all of [their] players ... currently considered Testers." They state that, "Things will go wrong. Bugs will occur."[7] FarmVille started as a clone of the popular Farm Town on Facebook.[8] On February 4, 2010, Microsoft's MSN Games has also launched FarmVille on its website,[9][10] requiring a Facebook account but not a Windows Live ID in order to play the game. On June 7, 2010, at Apple's WWDC, the CEO of Zynga announced that they were porting FarmVille for the Flash-less iOS platform.[11] It was later released on 23 June 2010 for the iPhone, iPod Touch and iPad.